Add token-count badge to README

[rsamf]

Hi! This PR adds one line to the README: a badge showing an estimate of how many LLM tokens this repo weighs. Since this project is the kind of thing people load into an LLM's context window, the number seemed genuinely useful to surface.

Preview:

Full disclosure: I built the free, open-source service behind the badge (https://github.com/rsamf/gittokens), and I'm proposing it to a small, hand-picked set of repos where it seems like a good fit. If it isn't a fit here, please just close this, and I won't resubmit.

Summary by CodeRabbit

• Documentation
  • Added a tokens usage badge to the README.

[github-actions]

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: f29a403d-7d22-4234-a349-c42d5d868066

📥 Commits

Reviewing files that changed from the base of the PR and between 5de0285 and 236d005.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

README.md adds a tokens badge to the top badge row, linking to the corresponding Shields.io badge endpoint.

Changes

README Badge Update

Layer / File(s)	Summary
Add tokens badge README.md	The top badge section now includes a tokens badge linked to gittokens.rsamf.com.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: dearva, auroraziling

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: adding a token-count badge to the README.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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Warning

⚠️ This pull request has been flagged as potential spam (promotional) by CodeRabbit slop detection and should be reviewed carefully.